Within Ohio UFOs
The Helicopter Case That Still Puzzles Ohio
The 1973 Coyne helicopter case stands out because a military crew described a near mid-air encounter with aviation details.
On this page
- The flight and reported encounter
- Witness credibility and official records
- Meteors, aircraft and rival explanations
Page outline Jump by section
Introduction
The Mansfield helicopter encounter, usually called the Coyne incident, is one of Ohio’s most discussed UFO cases because it was not a casual roadside sighting. On 18 October 1973, a four-man US Army Reserve helicopter crew flying from Columbus to Cleveland reported a near mid-air encounter with a lighted, cigar-shaped object near Mansfield, followed by radio trouble, a strange green illumination and an unexpected climb. The case matters because it sits at the crossroads of witness credibility, aviation safety and disputed explanation: it has multiple trained airborne witnesses, some claimed ground corroboration, and a later technical report, but no photograph, radar confirmation or recovered physical evidence. [Center for UFO Studies]cufos.orgCenter for UFO Studies
Within Ohio UFO history, this is the state’s strongest aviation-centred case after the closure of Project Blue Book. It does not prove an extraterrestrial craft. It does, however, remain difficult to compress into a simple “strange light” report, because the crew described an apparent collision course, evasive action, cockpit effects and post-event investigation by UFO researchers who treated the flight details as central rather than decorative. [Center for UFO Studies]cufos.orgCenter for UFO Studies
The flight and reported encounter
The flight began routinely. The crew had flown from Cleveland to Columbus for scheduled medical examinations, then departed Port Columbus at about 10:30 p.m. for the return to Cleveland. The aircraft was a UH-1H “Huey” helicopter, reportedly cruising near Mansfield at about 90 knots and 2,500 feet mean sea level on a clear, calm, moonless night with around 15 miles’ visibility. The crew members were Captain Lawrence J. Coyne, co-pilot 1st Lieutenant Arrigo Jezzi, Sergeant John Healey and crew chief Robert Yanacsek. [Center for UFO Studies]cufos.orgCenter for UFO Studies
The sequence usually begins with Healey noticing a red light to the west and then Yanacsek seeing a steady red light on the eastern horizon. At first, it seemed like distant traffic or a tower light. Then it appeared to close rapidly on the helicopter. Coyne took the controls from Jezzi, began a powered descent, and tried to contact Mansfield control tower to ask whether high-performance aircraft were in the area. In the crew’s account, the object continued towards them on what looked like a collision course, with speed later estimated at more than 600 knots. [Center for UFO Studies]cufos.orgCenter for UFO Studies
The most dramatic part of the story is the reported moment of closest approach. The crew said the red light seemed to decelerate abruptly, hover or pass near the helicopter, and reveal a grey or metallic elongated form with unusual lighting. Accounts describe a green light flooding the cockpit or shining down around the aircraft. After the object moved away, the crew reportedly found that the helicopter had climbed rather than continued the intended descent. Zeidman’s CUFOS report summarised the observation as lasting roughly 300 seconds, with radio communications interrupted, instrument and control irregularities reported, and an unexplained climb of about 1,800 feet claimed by the pilot. [Center for UFO Studies]cufos.orgCenter for UFO Studies
This is why the Mansfield case remains more aviation-specific than many famous UFO stories. The important details are not just shape and colour, but heading, altitude, descent rate, communications, cockpit workload and the possibility of a near mid-air collision. A report that says “we saw lights” is hard to assess. A report that says “we took evasive action, queried air traffic, lost communications, saw an object at close range, and then found the aircraft climbing” creates a more demanding set of questions.
Why the crew’s credibility still matters
The Coyne case has lasted largely because of who made the report. Captain Coyne was a 36-year-old Army Reserve officer with long flying experience and ratings in fixed-wing aircraft, helicopters and seaplanes. The other three men were not anonymous thrill-seekers either: Jezzi was a helicopter-rated co-pilot, Healey was both flight medic and Cleveland police detective, and Yanacsek had served as a helicopter crew chief in Vietnam. That does not make them infallible, but it does make the case harder to dismiss as a simple misunderstanding by untrained observers. [Center for UFO Studies]cufos.orgCenter for UFO Studies
Jennie Zeidman’s later CUFOS study is central to the case’s reputation. Zeidman wrote that J. Allen Hynek and she interviewed the crew separately and together over several years, and that additional ground witnesses were later located and interviewed. She argued that the main witness accounts showed no sign of collusion, hoaxing or deliberate exaggeration, while acknowledging the normal variations that appear when different people describe the same stressful event. [Center for UFO Studies]cufos.orgCenter for UFO Studies
The case also gained public attention beyond local reporting. The crew received the National Enquirer Blue Ribbon Panel’s $5,000 award for what was described as the most scientifically valuable UFO report of 1973, and Coyne later spoke about the case in a wider UFO setting, including testimony connected with 1978 United Nations UFO discussions. Those details cut both ways. They show that the case was taken seriously by UFO advocates and media at the time, but they also gave sceptics a reason to ask whether later fame and reward may have hardened the story’s public form. [Ashland Source]ashlandsource.comcoyne incident over charles mill lake was most credible ufo sighting of 1973Ashland SourceCoyne Incident over Charles Mill Lake was most credible…4 Oct 2020 — According to the Center for UFO Studies, the Coyne…
What the official and investigative trail can actually support
The strongest documentary strand is not an Air Force conclusion, because Project Blue Book had already ended before 1973. Instead, the case rests on Army-linked reporting, FAA and tower questions, witness interviews, UFO research files and later local historical coverage. The NICAP case directory preserves a summary identifying the event as an “E-M / Magnetic Compass Encounter” and gives the basic flight details: helicopter 68-15444, returning from Columbus to Cleveland, southeast of Mansfield Airport at 2,500 feet on a heading of about 030 degrees when the first red light was observed. [nicap.org]nicap.orgUF O Report Jennie ZeidmanUFO ReportJennie Zeidman: October 18, 1973; Mansfield, Ohio 11:05 p.m. Army Reserve helicopter encountered domed, craft-like object that…
Zeidman’s report says Coyne later checked with the FAA and found no record of another aircraft in the area, with the last known F-100 from the Mansfield Air National Guard having landed at 10:47 p.m. That is important, but it is not the same as a complete modern radar reconstruction. It weakens a straightforward “nearby known jet” explanation, while leaving room for gaps in tracking, unreported traffic, timing uncertainty or witness misperception under stress. [Center for UFO Studies]cufos.orgCenter for UFO Studies
The reported compass and radio effects are among the most intriguing claims, but also among the hardest to use as proof. Zeidman’s report discusses the radio issue in detail: the crew believed the radios were keying and changing frequencies, but they were not getting useful contact back. The report also describes the magnetic compass behaviour and notes a later technical comment that a local magnetic field could in principle affect part of the system, while also raising the difficulty that the reported continued compass rotation into the next day would not be explained simply by a transient external field. [Center for UFO Studies]cufos.orgCenter for UFO Studies
That is the right level of caution. Instrument anomalies make the case more interesting, but the surviving public record does not let a reader distinguish cleanly between equipment fault, cockpit confusion, interference, maintenance issue and extraordinary external cause. The compass story is evidence of an anomaly in the report; it is not, by itself, evidence of what caused the anomaly.
Ground witnesses and the Charles Mill Lake setting
One reason the case is often described as unusually strong is the claimed ground corroboration near Charles Mill Lake. Later UFO investigators reported locating five ground witnesses, including children in a car, who said they saw both a helicopter and a separate lighted object, with green illumination affecting the surrounding scene. Cleveland UFO’s case summary, drawing on Zeidman and related material, says the object was described from the ground as blimp-like, school-bus-sized or pear-shaped, and that the green light made the helicopter, trees, road and car appear green. [Cleveland Ufology Project]clevelandufo.comSource details in endnotes.
This matters because independent ground witnesses, if accurately identified and timed, can reduce the chance that the aircrew simply misread a distant meteor or aircraft. Yet it also introduces a problem common in older UFO cases: the ground accounts were not gathered by a neutral accident-investigation board immediately after the event. They were located later by UFO researchers, and the public record is mediated through those investigators’ summaries. The accounts may be sincere and valuable, but they are not the same as contemporaneous signed statements collected before press coverage shaped local memory. [Center for UFO Studies]cufos.orgCenter for UFO Studies
The north-central Ohio setting also matters. Local histories from Richland and Ashland County note that the Mansfield case was part of a broader period of strange-light reports in 1973, not an isolated rumour that appeared years later. That wider sighting atmosphere helps explain why the case entered Ohio folklore so quickly. It also means caution is needed: a “flap” can produce real clusters of reports, but it can also encourage people to connect unrelated lights, aircraft and memories into one larger story. [Richland County History]richlandcountyhistory.comufos over richland county 1973ufos over richland county 1973
Meteors, aircraft and rival explanations
The most famous sceptical explanation is that the crew saw a bright meteor, possibly associated with the Orionid meteor shower. That was the line associated with aviation writer and UFO sceptic Philip J. Klass. The timing is not absurd: NASA describes the Orionids as a mid-October meteor shower known for bright, fast meteors travelling about 66 kilometres per second and sometimes leaving glowing trains. A sudden brilliant light in October skies is exactly the kind of thing that can trigger UFO reports. [wmfd.com]wmfd.comoctober 18th marks 50th anniversary of mansfield area ufo encounteroctober 18th marks 50th anniversary of mansfield area ufo encounter
The meteor explanation has real strengths. Meteors can appear suddenly, move very fast, seem closer than they are, show colours, and leave vivid impressions on startled observers. In a dark cockpit, with a crew already monitoring a light and facing a possible traffic conflict, perception and timing could become distorted. A meteor also requires no hidden aircraft, no secret vehicle and no exotic technology.
But the meteor explanation struggles with the reported duration and manoeuvres. Zeidman’s analysis estimated an observation of about five minutes, not a few seconds, and argued that the object’s apparent deceleration, hovering, close approach, green illumination and matching ground-witness sequence did not fit a meteor. Cleveland UFO’s summary makes the same sceptical-of-scepticism point: if the event really lasted hundreds of seconds and involved angular changes and close-range form, it is hard to treat it as one fireball. [Center for UFO Studies]cufos.orgCenter for UFO Studies
The aircraft explanation has a different problem. The Mansfield area had military aviation links, and Coyne himself reportedly wondered about an F-100. A fast jet can explain alarm, evasive action and confusion better than a meteor can. Yet Zeidman’s report says the last known F-100 had landed before the encounter, and her aircraft comparison noted that the reported object combined qualities that do not sit comfortably together: very high speed, sudden slowing or hovering, no obvious aircraft noise at close range, and a shape that did not match normal wings, engine pods or tail features. [Center for UFO Studies]cufos.orgCenter for UFO Studies
A helicopter or other low-flying aircraft is not a perfect fit either. A helicopter can hover, but not at the high forward speeds reported. A fixed-wing aircraft can be fast, but cannot stop or hover in front of another aircraft in the way the crew described. This does not prove the object was extraordinary; it shows that any ordinary-aircraft explanation has to lean heavily on witness error, distance misjudgement, or incorrect reconstruction of the object’s path. [Center for UFO Studies]cufos.orgCenter for UFO Studies
The aviation questions that keep the case alive
The Mansfield encounter remains useful because it asks practical questions that go beyond belief or disbelief. If the crew’s account is even partly accurate, what should pilots do when an unidentified light appears to be converging? Coyne’s reported response was aviation-first: take control, descend, and call the tower to ask about traffic. That is one reason the case has aged better than stories built only around exotic interpretation. The behaviour described is consistent with a pilot treating the object as a collision hazard before treating it as a mystery. [Center for UFO Studies]cufos.orgCenter for UFO Studies
The case also shows why aviation UFO reports are unusually difficult to evaluate. A pilot has training, but is also under workload. A helicopter cockpit gives a moving, vibrating, instrument-filled viewpoint, not a stable observatory. At night, size, distance and speed can be badly misjudged when the object is an isolated light without clear background reference. Even trained witnesses can accurately report what they experienced while being wrong about distance or scale.
At the same time, training cannot simply be waved away. Coyne and the crew knew aircraft lighting conventions, radio procedures and the feel of their machine. They were also exposed to the event from different positions inside the helicopter. A fair assessment should therefore avoid two lazy conclusions: “trained witnesses cannot be wrong” and “all UFO witnesses are unreliable”. The stronger reading is that trained witnesses can still misperceive, but their detailed operational claims deserve closer scrutiny than an ordinary anonymous light-in-the-sky report.
What later reporting strengthened and weakened
Later reporting has strengthened the case’s place in Ohio memory more than it has strengthened the physical evidence. Local retrospectives by Ohio Magazine and north-central Ohio outlets keep the case alive because it is vivid, well-located and attached to named witnesses rather than anonymous rumour. These accounts also preserve details that readers care about: the Charles Mill Lake area, the Army Reserve crew, the reported green beam, the damaged or replaced compass, and the crew’s later public recognition. [ohiomagazine.com]ohiomagazine.comThe Case of Ohio's Best Documented UFOCoyne took evasive action, diving the helicopter, but the other aircraft followed… [Richland County History]richlandcountyhistory.comufos over richland county 1973ufos over richland county 1973
What later reporting has not supplied is the kind of independent data that would transform the case. There is no widely cited photograph of the object, no recovered material, no public radar plot that cleanly maps the encounter, and no modern official re-investigation that settles the flight path. The best pro-case material is still Zeidman’s reconstruction and the witness interviews. The best sceptical pressure is still the possibility that a meteor, aircraft, instrument issue and stressful cockpit perception were combined into a more extraordinary narrative after the fact. [Center for UFO Studies]cufos.orgCenter for UFO Studies
That leaves the Coyne incident in a middle category: stronger than most UFO anecdotes, weaker than proof of an extraordinary craft. Its durability comes from the aviation detail, the named crew, the claimed ground witnesses and the fact that simple explanations do not fit all reported features neatly. Its weakness is the absence of decisive independent records and the unavoidable uncertainty of reconstructing a night-time, high-stress event from human testimony.
Why Mansfield still belongs at the centre of Ohio UFO history
For Ohio’s UFO history, the Mansfield helicopter case is not important because it “solves” the UFO question. It is important because it shows the best version of the problem: serious witnesses, a plausible aviation hazard, enough detail to analyse, and enough gaps to prevent certainty. It also connects Ohio’s post-Blue Book era to a broader national UFO wave in 1973, while remaining strongly local: a Columbus-to-Cleveland Army Reserve flight, Mansfield-area airspace, Charles Mill Lake ground witnesses and north-central Ohio press memory. [Ashland Source]ashlandsource.comcoyne incident over charles mill lake was most credible ufo sighting of 1973Ashland SourceCoyne Incident over Charles Mill Lake was most credible…4 Oct 2020 — According to the Center for UFO Studies, the Coyne…
The most responsible conclusion is that the Mansfield helicopter encounter remains unresolved in public evidence. A bright meteor during the Orionid season is a plausible challenge to parts of the story, and an aircraft or cockpit-perception explanation cannot be ruled out completely. Yet the full report as described by the crew — near collision, rapid deceleration, green illumination, radio trouble, compass anomaly and unexpected climb — is not comfortably explained by any one ordinary cause. That tension is exactly why the Coyne case still puzzles Ohio.
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Endnotes
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Source: cufos.org
Title: Center for UFO Studies
Link: https://cufos.org/PDFs/books/A%20Helicopter-UFO%20Encounter%20Over%20Ohio.pdf -
Source: nicap.org
Title: UF O Report Jennie Zeidman
Link: https://www.nicap.org/731018mansfield_dir.htmSource snippet
UFO ReportJennie Zeidman: October 18, 1973; Mansfield, Ohio 11:05 p.m. Army Reserve helicopter encountered domed, craft-like object that...
Published: October 18, 1973
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Source: ohiomagazine.com
Link: https://www.ohiomagazine.com/ohio-life/article/the-case-of-ohio-s-best-documented-ufoSource snippet
The Case of Ohio's Best Documented UFOCoyne took evasive action, diving the helicopter, but the other aircraft followed...
-
Source: wmfd.com
Title: october 18th marks 50th anniversary of mansfield area ufo encounter
Link: https://www.wmfd.com/article/october-18th-marks-50th-anniversary-of-mansfield-area-ufo-encounter/17797 -
Source: science.nasa.gov
Link: https://science.nasa.gov/solar-system/meteors-meteorites/orionids/ -
Source: cufos.org
Link: https://cufos.org/PDFs/CUFOS_Associate_Newsletter/AN5_2.pdf -
Source: cufos.org
Link: https://cufos.org/PDFs/IUR%20issues/IUR%20Vol.%2013%20No.%206%20Nov.-Dec.%201988.pdf -
Source: cufos.org
Link: https://cufos.org/PDFs/CUFOS_Bulletin/Bulletin017.pdf -
Source: cufos.org
Title: Phenomena in USSR A 548
Link: https://cufos.org/PDFs/pdfs/Phenomena_in_USSR_A-548.pdf -
Source: cufos.org
Link: https://cufos.org/PDFs/IUR%20issues/IUR%20Vol.%2014%20No.%202%20March-April%201989.pdf -
Source: cufos.org
Link: https://cufos.org/PDFs/books/Ufos_And_The_Extraterrestrial_Contact_Movement_v1.pdf -
Source: cufos.org
Title: IUR Vol. 17 No. 3 May June 1992
Link: https://cufos.org/PDFs/IUR%20issues/IUR%20Vol.%2017%20No.%203%20May-June%201992.pdf
Published: June 1992 -
Source: ashlandsource.com
Title: coyne incident over charles mill lake was most credible ufo sighting of 1973
Link: https://www.ashlandsource.com/2020/10/04/coyne-incident-over-charles-mill-lake-was-most-credible-ufo-sighting-of-1973/Source snippet
Ashland SourceCoyne Incident over Charles Mill Lake was most credible...4 Oct 2020 — According to the Center for UFO Studies, the Coyne...
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Source: clevelandufo.com
Link: https://clevelandufo.com/?page_id=18 -
Source: richlandcountyhistory.com
Title: ufos over richland county 1973
Link: https://richlandcountyhistory.com/2019/09/02/ufos-over-richland-county-1973/ -
Source: ufologie.patrickgross.org
Link: https://ufologie.patrickgross.org/htm/coyne.htm -
Source: Wikipedia
Title: Philip J. Klass
Link: https://en.wikipedia.org/wiki/Philip_J._Klass -
Source: Wikipedia
Link: https://en.wikipedia.org/wiki/Orionids -
Source: spacecentre.co.uk
Title: orionid meteor shower
Link: https://www.spacecentre.co.uk/news/space-now-blog/orionid-meteor-shower/ -
Source: clevelandufo.com
Link: https://clevelandufo.com/?page_id=277
Additional References
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Source: youtube.com
Title: OVO je postalo smiješno!?
Link: https://www.youtube.com/watch?v=HPHcD8mJpOsSource snippet
This video highlights Top 10 Most Convincing UFO Discoveries Ever Recorded because it breaks down the specific technical details of the 1...
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Source: youtube.com
Title: COYNE UFO INCIDENT: “Igrao se s vojnim helikopterom poput igračke”!
Link: https://www.youtube.com/watch?v=otzw9k15OacSource snippet
SYND 15/10/73 UFO SPOTTED IN THE SKIES OVER OHIO...
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Source: youtube.com
Title: Top 10 Unsettling Signs Of UFO’s Found In Ohio
Link: https://www.youtube.com/watch?v=9AkQ29QyycUSource snippet
COYNE UFO INCIDENT: "Igrao se s vojnim helikopterom poput igračke"...
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Source: youtube.com
Title: Top 10 Most Convincing UFO Discoveries Ever Recorded
Link: https://www.youtube.com/watch?v=vRzzRa8yAUESource snippet
Top 10 Unsettling Signs Of UFO's Found In Ohio...
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Source: thislocallife.com
Link: https://www.thislocallife.com/5-ufo-cases-in-ohio -
Source: amsmeteors.org
Link: https://www.amsmeteors.org/index.html -
Source: facebook.com
Link: https://www.facebook.com/RichlandSource/posts/capt-lawrence-j-coyne-described-himself-as-a-skeptic-of-ufos-but-admitted-he-cou/3438125879567233/ -
Source: facebook.com
Link: https://www.facebook.com/lowellobservatory/posts/every-october-earth-crosses-paths-with-dust-left-behind-by-halleys-comet-those-t/1233516725477945/ -
Source: facebook.com
Link: https://www.facebook.com/sandraboynton/posts/every-october-earth-passes-through-the-debris-of-halleys-comet-giving-us-ta-daaa/1385637706256989/ -
Source: facebook.com
Link: https://www.facebook.com/NASA/posts/keep-an-eye-on-the-night-sky-in-octoberyou-might-catch-a-falling-starthe-orionid/1347647323397307/
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